| Author | Message | ||
| '75 308 GT4 (Peter)
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Older cars like mine use a cable to actuate the heater valve. Modern cars use vacuum to operate these controls. Could be a leaky vacuum hose? Ferraris may be known to have weak A/C, but definitely not weak heaters! P.S. I found out the hard way: Careful when bleeding the rad/thermostat. I got a short burst of spray hit me in the face as I bled my car on Sunday. I luckily just cracked the screw open, so quickly shut it when it blew. I didn't get hurt, but it got my attention! | ||
| Danny R. West (Dan_West348ts)
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I asked about this same issue once at a dealership. Turn on the heat full, not with a temperature set to a degree setting, but full up. If heat does not come out then you may have a problem. However, if heat blows then it could mean that the tempature in your cabin was not that far off from where the enviroment setting was set. I hope that makes sense.  Dan | ||
| Kurt Kjelgaard (Kurtk328)
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Could be air in the system. I don't know much about 348's, but on my 328 there is a bleed screw on the thermostat housing. Try to bleed that (if you have one) before you do anything else. Engine warm and running. Next steps involves verification that the heater valve actually moves when commanded and checking for blocking in hoses and core. Others in the forum have more experience with 348's, but these steps are more or less standard for any car. Good luck brgds Kurt | ||
| Mark McKenzie (Redcar)
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Trying my 348 heater for the first time last night, I found that there's no heat? The orange light lit up, and the blower blew, and the airflow even switched to the floor as I raised the desired temp to 80, but never got any warmth, just cool air?? Any ideas? The car was fully warmed up, is there a seperate circuit for the heater core? Thanks Mark McKenzie |